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Home >> Chrysler >> 2010 >> PT Cruiser >> Repair and Diagnosis >> Engine Performance >> System >> Gas - DTCS P2504 To U1418 >> U0121-Lost Communication With Anti-Lock Brake Module >> Possible Causes

Possible Causes

Possible Causes 
CAN C BUS OPEN OR SHORTED CONDITION
ANTI-LOCK BRAKE (ABS) MODULE
FRONT CONTROL MODULE (FCM)
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.  See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .